He is the former lead vocalist of the death metal bands Atrophia Red Sun and Decapitated.

[2] On 29 October 2007, the tour bus for Decapitated was involved in an accident with a truck carrying wood in Gomel, on the Russia–Belarus border.

[3] Covan's family released a short update in October 2008 concerning his improving condition.

[4] In 2008, Kowanek left Decapitated during the band's hiatus, due to his slow recovery.

He had reportedly suffered from cardiac arrest and cerebral hypoxia, which left him paralyzed and reliant on a wheelchair.